How many years old is the tree planted to commemorate...
Count how many palings are in 1 metre. Use this to estimate the number in the entire park.
Measure the circumference of the oak tree by the paddling pool.
Estimate how many paces it would take you to get round the whole park. How close were you?
Find the area of the slabbed area beside the caf&eacute;.
If you go to the ice cream van with a &pound;2 coin, what is the biggest ice cream you can get? How much change would you get?

Maths in the City? Marcus du Sautoy has organised a mathematical tour of Oxford.
Bletchley Park - fabulous place for introducing coding.
Bank of England - fabulous little museum with superb workshops.
Science Museum - see the real Napier's Bones - loads of other calculating stuff.
The Science Museum near Winchester - can't remember the name - but has some really good stuff including a superb illustration of Pythagoras' Theorem with a spinning triangle with water in the squares on the three sides.
The Science Museum in Cardiff also looks good, but not yet tried it.
There is also a tiny lovely museum that I am on-line trying to find!!!
The Story of Maths (Marcus du Sautoy - he is my hero!) also showed a small Newton Museum in East Anglia in Newton's birthpplace - cannot remember where though.